例句與造句

1. Much recent research has focused on combinatorial principles that do not fit neatly into this framework, like RT 2 2 ( Ramsey's theorem for pairs ).
2. The connection of the Bernoulli number to various kinds of combinatorial numbers is based on the classical theory of finite differences and on the combinatorial interpretation of the Bernoulli numbers as an instance of a fundamental combinatorial principle, the inclusion-exclusion principle.
3. In contrapositive, this means that if ZFC proves a \ Sigma ^ 1 _ 3 sentence then that sentence is also provable in ZF . The same argument can be applied to any other principle which always holds in the constructible universe, such as the combinatorial principle ?%.
4. It's difficult to find combinatorial principles in a sentence. 用combinatorial principles造句挺難的